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Finding the Fourth Proportional to 1,117.79, 1,677.50 and 570.43

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Solution

The fourth proportional to 1,117.79, 1,677.50 and 570.43 is: 856.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.79 : 1,677.50 = 570.43 : x
  2. Step 2: Convert to fraction form
    1,117.79/1,677.50 = 570.43/x
  3. Step 3: Cross multiply
    1,117.79x = 1,677.50 × 570.43
  4. Step 4: Simplify right side
    1,117.79x = 956,896.33
  5. Step 5: Solve for x
    x = 956,896.33/1,117.79
  6. Step 6: Final answer
    x = 856.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.